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What is another term for strain?
Strains are tears in the muscle. Sometimes called pulled muscles, they usually occur because of overexertion or improper lifting techniques.
Is there any difference between work hardening and strain hardening?
In strain hardening hypothesis, the size of the yield locus is assumed to beindependent of the third invariant.In work hardening hypothesis, the size of the yield locus is assumed to depend on the total plastic work done (per unit volume) to achieve the present state of plastic deformation since last annealinfor isotropic hardening Both are same.
What happens to strain when stress is increased in a material?
It also increases. It increases linearly with stress in the elastic range, then increass more rapidly once the material is plastic ( yielded).
What is strain to failure?
strain-to-failure
How do you calibrate strain gauges?
The strain gage indicates strain, and the stress is from Hooke's law; stress = modulus times strain so you need to know the modulus of elasticity
Which type of strain permanently changes rocks?
Plastic strain.
Are all minerals brittle?
This depends on the confining pressure, the temperature and the strain rate applied to the mineral. In general for minerals (and other materials), the lower the rate of strain, the more likely ductile or plastic creep deformation will occur. The higher the strain rate, the more likely brittle deformation is to occur. As the confining pressure increases, an objects shear strength will increase (this usually coincides with a greater depth of burial) and due to the earth's thermal gradient an increase in temperature. As the shear strength increases, brittle failure is less likely and the higher temperature means that plastic deformations or creep are more likely to occur.
Why do some rocks bend while other rocks break?
This depends on the confining pressure, the temperature and the strain rate applied to the rock mass. In general, the lower the rate of strain, the more likely ductile or plastic deformation leading to bending or folding will occur. The higher the strain rate, the more likely brittle deformation is to occur, leading to the rock "breaking". As the confining pressure increases, a materials shear strength will increase (this usually coincides with a greater depth of burial) and due to the Earth's thermal gradient an increase in temperature. As the shear strength of the rock increases, the occurrence of brittle failure is less likely while the higher temperature means that plastic deformations are more likely to occur.
Which are used for short range predictions of when earthquakes will occur?
Answer: Strain in rocks near faults.
Why stress decreases after the plastic range in stress strain graph?
Strees decreases after the plastic range because the material has releived the strees through movement.
What causes plastic flow to occur?
High pressure
Strain energy definitions?
Strain energy is a form of potential energy. Work done to distort an elastic member is stored as strain energy. Some energy may be lost in plastic deformation of the member and some may be converted into heat instead of stored as strain energy, but the rest is recoverable. A spring is an example of a storage device for strain energy.
What is a strain like a muscle strain?
A strain is when you tear the muscle tissue slightly by over-stretching it. They occur when you put too much stress on the muscle - for example, by trying to lift something too heavy or by twisting too far.
What is the effect of springback concept on plastic deformation?
Springback means Recovered elastic strain on material after the load is removed.
What is residual strain?
Residual Strain is the same thing as permanent strain, as in permanent strain in a beam. If you refer to a stress vs strain plot, you'll see that this relationship in metals is linear up until the yield point where the metal plastically deforms. After stress slightly decreases due to this yielding, It will continue to increase, along with strain but on a more curve-shaped line. When stress is removed from the metal, it will slowly decrease back down to 0, but there will be an offset in the strain. The distance from where strain equals zero to this new point along the axis is the the residual strain left in the metal due to plastic deformation.
What Plastic deformation such that work hardening does not occur is called?
Cold working
What are examples of elastic spring force?
If you stretch a rubber band then release it, it will return to its original shape. That is by definition elastic strain. Anything that returns to its original shape after being affected by force underwent elastic strain. If it is permanently deformed (ie you bent a paperclip out of place and it wont return to its original shape) then it passes the elastic strain region and suffered plastic strain.
